Servlets and Execute Queues

Question

6.0 doc in the "Known Issues" has the following:
          039575
          If your servlet makes an HTTP connection back to the same server there is the
          possibility of deadlock under load. To work around the problem, use a separate
          execute queue for the servlet that returns the DTD.
          My question is: is the process of setting up servlets etc to use separate execute
          queues documented somewhere?
          TIA
          Dimitri
          

Answer 1

In fact, it is (sort of) documented in 6.0sp1 (for some reason console
          didnt use this in 6.0):
          Thread dump shows
          2 threads for queue: '__weblogic_admin_html_queue'"
          and
          2 threads for queue: '__weblogic_admin_rmi_queue'"
          looking at the console.war/WEB-INF/web.xml shows how console servlets are
          configured to use separate execute queue:
          <servlet>
          <servlet-name>...servlet name...</servlet-name>
          <servlet-class>...servlet class...</servlet-class>
          <init-param>
          <param-name>wl-dispatch-policy</param-name>
          <param-value>__weblogic_admin_html_queue</param-value>
          </init-param>
          </servlet>
          For RMI (as rmi_queue name suggests) stuff looking at things generated
          by weblogic.ejbc shows that dispatchpolicy is mentioned in the .ser'ialzed
          deployment descriptor.
          Cameron Purdy <[email protected]> wrote:
          > (I thought you asked this before.) I haven't seen it doc'd yet, and they
          > said it might not be 'til the next release. I've been checking the "dima"
          > web site for doc on it, but haven't found any yet ;-).
          > --
          > Cameron Purdy
          > Tangosol, Inc.
          > http://www.tangosol.com
          > +1.617.623.5782
          > WebLogic Consulting Available
          > "Dimitri Rakitine" <[email protected]> wrote in message
          > news:[email protected]...
          >> 6.0 doc in the "Known Issues" has the following:
          >>
          >> 039575
          >> If your servlet makes an HTTP connection back to the same server there is
          > the
          >> possibility of deadlock under load. To work around the problem, use a
          > separate
          >> execute queue for the servlet that returns the DTD.
          >>
          >> My question is: is the process of setting up servlets etc to use separate
          > execute
          >> queues documented somewhere?
          >>
          >> TIA
          >> Dimitri
          >>
          Dimitri